can 7 week old chicks get cocci, they are still in a brooder and have not been exposed to any other birds, I keep the brooder clean but maybe will clean it fully today. I saw some small amounts of blood in their stool.

I don't know the answer, but am interested in what others have to say...

If coccidia is a parasite/protozoal infection found in the environment outside and in other birds & animals, then it does *NOT* make sense to me how chicks having never been exposed to other birds or the outdoors can get it?????????????!!!!!! Altho I have read some posts that imply that they CAN (??????!!!!!).

Some sort of gastroenteritis from new food item or over-exposure to normal bacteria in own poop makes more sense to me... (NOT implying they aren't cleaned, but I know mine are messy little boogers who probably get an occasional beakful of poop no matter what I do!!)..

Yes, cocci is not viral or bacterial, but rather a a single cell parasitic protozoa that grows in the intestine. You can treat with a coccidiostat such as Amprolin which is used in medicated starter grower. Note that the medicated feed does not cure an outbreak, but rather allows the chickens to develop a tolerance to it. Your best course of action is sanitation since it is spread through the droppings , and treatment with drugs.

if amprolium in the chick feed wont nip it, and you want to try the coccidiostat:

amprolium 9.6% is sold under the brand name Corid.

it does not say chickens on the bottle, but i called the manufacturer and they were nice enough to tell me 1 tsp per gallon (fresh each day for 3 days) is what some poultry people use for ADULT chickens. you would need to research about safety/dosage for chicks. i found a 16 oz. bottle online.

that being said, it didn't help my adult chickens, neither did sulmet, so now i have a vet appointment, thinking that what they have might be respiratory, not cocci, and that i need tylan.

good luck, hope you get a speedy resolution.

(fyi, supposedly amprolium is the only safe drug of these types to use in ADULT active egg layers.)